Asynchronous I/O latency to a solid-state disk greatly increased
mm.h: hardcode readahead to 2048Kb

Signed-off-by: franciscofranco <franciscofranco.1990@gmail.com>
sync.c: add a module_param to fsync() calls. fsync is still disabled by default but users will have the choice of having a faster build or a safer build (for data integrity). Props for simms for busting my ass off with this one :)
Merge branch 'Working' of https://github.com/RAZR-K-Devs/android_kernel_motorola_omap4-common into Working